/*
GanttProject is an opensource project management tool.
Copyright (C) 2011 GanttProject Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 3
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
package net.sourceforge.ganttproject.action.resource;

import java.util.ArrayList;
import java.util.List;

import net.sourceforge.ganttproject.action.ActionDelegate;
import net.sourceforge.ganttproject.action.ActionStateChangedListener;
import net.sourceforge.ganttproject.action.GPAction;
import net.sourceforge.ganttproject.resource.HumanResource;
import net.sourceforge.ganttproject.resource.HumanResourceManager;
import net.sourceforge.ganttproject.resource.ResourceContext;

//TODO Add listener for changed resource selection, see TaskActionBase
/**
 * Action base for resource related actions
 */
abstract class ResourceAction extends GPAction implements ActionDelegate {
    private final HumanResourceManager myManager;
    private final List<ActionStateChangedListener> myListeners = new ArrayList<ActionStateChangedListener>();
    private final ResourceContext myContext;

    public ResourceAction(String name, HumanResourceManager hrManager) {
        this(name, hrManager, null, IconSize.NO_ICON);
    }

    protected ResourceAction(String name, HumanResourceManager hrManager, ResourceContext context, IconSize size) {
        super(name, size.asString());
        myManager = hrManager;
        myContext = context;
    }

    @Override
    public void addStateChangedListener(ActionStateChangedListener l) {
        myListeners.add(l);
    }

    protected HumanResourceManager getManager() {
        return myManager;
    }

    protected boolean hasResources() {
        HumanResource[] selection = myContext.getResources();
        return selection != null && selection.length > 0;
    }

    protected HumanResource[] getSelection() {
        HumanResource[] selection = myContext.getResources();
        return selection == null ? new HumanResource[0] : selection;
    }

    @Override
    public void setEnabled(boolean newValue) {
        super.setEnabled(newValue);
        for(ActionStateChangedListener l: myListeners) {
            l.actionStateChanged();
        }
    }
}
